Shower as soon as possible after sweating
Use a gentle, fragrance-free body wash daily
Wash the shoulder area with a benzoyl peroxide cleanser
Use a salicylic acid body wash if benzoyl peroxide is too irritating
Exfoliate gently 1 to 2 times per week
Avoid scrubbing hard or using rough loofahs
Wear loose, breathable clothing
Change sweaty shirts, sports bras, and workout clothes promptly
Wash bedding, towels, and workout clothes regularly
Keep hair products off your shoulders
Avoid heavy, oily lotions and body oils on the area
Do not pick or squeeze the acne
Use non-comedogenic sunscreen and skincare products
Reduce friction from backpacks, straps, and tight clothing
Try an over-the-counter adapalene gel at night
See a dermatologist if it is severe, painful, or not improving after several weeks